the ufo appeared for 10 seconds and it was gone faster then i can blink my eyes!

There where strange cloud formations, like rings in the sky and in the center we saw a triangle. There was three lights on each point of the Triangle. White,Red,and yellow. It was in the sky for a very short time before it was gone. Yes it was very silent. I could not hear anything like it was just floating in the sky no engine noise at all. I never Believed this stuff until i saw something and i don't think this was military plane.